Patent GB-730461-A (GB)
Title: Improvements in wetting agents
IPC: C11D3/36
Filed: 1950-04-13
Abstract: A wetting agent comprises a mixture of a substantially water-insoluble neutral trialkyl or trialkoxyalkyl ester of phosphoric acid and a water-soluble surface-active substance belonging to one of the groups: (a) salts of alkyl-aryl sulphonic acids containing 3-12 carbon atoms in the alkyl group, (b) salts of sulphonic acids of esters of organic polycarboxylic acids, (c) salts of acid sulphates of fatty alcohols or olefines containing 8-18 carbon atoms, (d) salts of long-chain fatty acid condensation products in which the chain of the fatty acid contains 11-17 carbon atoms and in which the carboxylic acid group is blocked by esterification or amidation with a hydroxy- or amino-compound containing a sulphonic or carboxylic acid group, (e) salts of sulphonated imidazole derivatives containing an aliphatic radical having a chain of 8-18 carbon atoms bound to the carbon atom in the 2-position of the azole ring, (f) salts of quaternary ammonium compounds containing a chain of 8-18 carbon atoms and (g) salts of amines containing an aliphatic radical having a chain of 17 carbon atoms.  There may be present more than one of either or both types of components.  The groups in the phosphate ester may be the same or different and, preferably, each group contains 3 to 8 carbon atoms. The ingredients may be mixed in the solid state or in the presence of inert liquids, e.g. water, to form pastes.  The prepared wetting-agents may be used for producing aqueous solutions or dispersions of wetting power higher than that of the ingredients. Numerous surface-active agents and phosphate esters are mentioned. In typical examples: (1) 100 parts of sodium di-butyl naphthalene sulphonate or sodium lauryl sulphate are mixed with 20 parts each of water and tri-n-butyl phosphate or tri-butoxyethyl phosphate; (2) 100 parts of N : N-diethyl-N-methyl-N1-oleyl-ethylene diamine methyl sulphate or 2-heptadecyl benzimidazole sulphonate are mixed with 40 parts water and 20 parts of tributyl phosphate. Specifications 524,847 and 587,279, [Group III], are referred to.ALSO:Aqueous emulsions having high wetting power are obtained from wetting agents comprising a mixture of a substantially water-insoluble neutral trialkyl or trialkoxyalkyl ester of phosphoric acid and a water-soluble surface-active substance belonging to one of the groups (a) salts of alkyl-aryl sulphonic acids containing 3-12 carbon atoms in the alkyl group, (b) salts of sulphonic acids of esters of organic polycarboxylic acids, (c) salts of acid sulphates of fatty alcohols or olefines containing 8-18 carbon atoms, (d) salts of long chain fatty acid condensation products in which the chain of the fatty acid contains 11-17 carbon atoms and in which the carboxylic acid group is blocked by esterification or amidation with a hydroxy- or amino-compound containing a sulphonic or carboxylic acid group, (e) salts of sulphonated imidazole derivatives containing an aliphatic radical having a chain of 8-18 carbon atoms bound to the carbon atom in the 2-position of the ring, (f) salts of quaternary ammonium compounds containing a chain of 8-18 carbon atoms and (g) salts of amines containing an aliphatic radical containing a chain of 17 carbon atoms.  Numerous examples of surface-active agents and phosphate esters are given.  Typical prepared wetting agents comprise (1) 100 parts of sodium di-butyl naphthalene sulphonate or sodium lauryl sulphate mixed with 20 parts each of water and tri-n-butyl phosphate or tri-butoxyethyl phosphate; (2) 100 parts of N : N-diethyl - N - methyl - N1 - oleyl - ethylene diamine methyl sulphate or 2 - heptadecyl benzimidazole sulphonate mixed with 40 parts of water and 20 parts of tributyl phosphate.  Specifications 524,847 and 587,279 are referred to.